There were five stages of grieves.
Denial, anger, bargaining, depression, and acceptance.
But don't you know, the demon version of Axel's family actually never made it past denial?
The three of them planned everything. They had been searching for a way to get their youngest back.
Even though he wasn't actually their youngest.
They watched every Axel's move around the house. They saw what he had been doing. They saw how the young boy relived everything that their real boy had gone through.
There was one thing though; they could make him their real boy.
When demon Kiaran saw the paper of the DM-2 experiment that Axel left on his desk, he recorded all of it in his brain.
He did what was best; he watched his own counterpart through the mirror.
Demon Kiaran followed his other self everywhere with a barrier of a mirror. He looked at how the other him went mad over the idea of a world burn. The demon looked as the human planned many things with a scientist.